CN110735168A

CN110735168A - micro-arc oxidation surface treatment device for bathroom metal workpiece

Info

Publication number: CN110735168A
Application number: CN201911043153.3A
Authority: CN
Inventors: 李保峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-01-31

Abstract

The invention discloses an micro-arc oxidation surface treatment device for a bathroom metal workpiece, which comprises a guide rod, a protection joint, an oxidation tank, a cover plate and a workbench, wherein a conductive mechanism is arranged in the protection joint and comprises a conductive nut and an anode plate which are fixedly arranged on the inner side wall of the protection joint, a conductive block and a plurality of compression springs are fixedly arranged between the conductive nut and the anode plate, an isolation plate is arranged between the anode plate and the inner side wall of the protection joint, the bottom end of the guide rod penetrates through the top wall of the protection joint and is in threaded connection with the conductive nut, and a negative pressure mechanism is arranged on the outer side wall of the protection joint.

Description

micro-arc oxidation surface treatment device for bathroom metal workpiece

Technical Field

The invention relates to the technical field of metal surface treatment, in particular to micro-arc oxidation surface treatment devices for bathroom metal workpieces.

Background

The micro-arc oxidation is also called as plasma oxidation, breaks through the limitation of the traditional anodic oxidation technology on voltage, when the voltage is increased, the electric potential at the interface of the electrolyte and the metal is increased sharply, so that the weak part of the formed oxide film layer is broken down and micro-arc discharge occurs, and layers of continuous, uniform and good-bonding-force ceramic films can grow in situ on the surface of the matrix metal under the action of high temperature and high pressure of a micro-arc discharge area.

The existing metal product micro-arc oxidation surface treatment device usually adopts a direct clamping or aluminum wire suspension mode to fix a workpiece, then the workpiece is placed in electrolyte to carry out micro-arc oxidation, because the contact area of a clamping piece or an aluminum wire and the workpiece is very small, the pressure on a contact surface is relatively large, the workpiece can be damaged, in addition, if the clamping piece is formed by forging various metals according to fixed proportion, part of the metals can also have oxidation reaction with the electrolyte in the micro-arc oxidation process to influence the surface treatment of the workpiece, and in the micro-arc oxidation process, the workpiece can generate relatively violent vibration due to the occurrence of a discharge phenomenon, so that the connection of components is unstable.

Therefore, micro-arc oxidation surface treatment devices for bathroom metal workpieces are proposed.

Disclosure of Invention

The invention aims to solve the defects that the surface of a workpiece is possibly damaged by a traditional fixing mode and the connection of components in a micro-arc oxidation surface treatment device is not stable enough in the prior art, and provides micro-arc oxidation surface treatment devices for bathroom metal workpieces.

In order to achieve the purpose, the invention adopts the following technical scheme:

A micro-arc oxidation surface treatment device for a bathroom metal workpiece, comprising a guide rod, a protection joint, an oxidation tank, a cover plate and a workbench, wherein a conductive mechanism is arranged in the protection joint, the conductive mechanism comprises a conductive nut and an anode plate which are fixedly arranged on the inner side wall of the protection joint, a conductive block and a plurality of compression springs are fixedly arranged between the conductive nut and the anode plate, an isolation plate is arranged between the anode plate and the inner side wall of the protection joint, and the bottom end of the guide rod penetrates through the top wall of the protection joint and is in threaded connection with the conductive nut;

install negative pressure mechanism on the lateral wall of protection joint, negative pressure mechanism establishes the annular sleeve on the protection joint lateral wall including the cover, many negative pressure passageways have been seted up along the circumferencial direction symmetry in the annular sleeve, every negative pressure passageway's bottom all is equipped with sealing device, every negative pressure passageway's top all is connected with the annular slab through the connector that corresponds.

Preferably, the side wall of the oxidation tank is internally provided with a heat exchange plate, the workbench is internally provided with a cavity, the cavity is internally provided with a cooler, and the output end of the cooler is fixedly connected with the heat exchange plate through a plurality of heat exchange heads.

Preferably, the plane of the lower surface of the anode plate is naturally located below the plane of the lower surface of the annular sleeve.

Preferably, every sealing device all includes the sealing ring, every the equal symmetry of axis direction is equipped with a plurality of closing plates in the sealing ring, every the closing plate is fan-shaped, and a plurality of closing plates corresponding in position constitute sealed plectanes under natural state jointly, every the diameter of sealed plectane is all 1mm-2mm less than the internal diameter that corresponds the sealing ring, every the closing plate outside all is equipped with flexible cover, every all install the magnetic path in the closing plate, every the magnetic path is made by samarium cobalt magnet or alnico magnet.

Preferably, a cavity is formed in the cover plate, the silencing cotton is filled in the cavity, two positioning columns are symmetrically welded on the lower surface of the cover plate, a groove edge is welded on the outer side wall of the notch of the oxidation groove, two grooves are symmetrically formed in the groove edge, the positions of the two grooves correspond to the positions of the two positioning columns respectively, and the length of each positioning column is smaller than the depth of the corresponding groove.

Preferably, an air cavity is formed in the annular plate, the upper end face of the air cavity is connected with a negative pressure generator through a guide pipe, and the negative pressure generator is electrically connected with a control instrument.

Preferably, the protection joint is made of flame-retardant polypropylene or polyvinyl chloride and other insulating materials, an insulating sleeve is sleeved outside the guide rod, an insulating plate is arranged between the anode plate and the inner side wall of the protection joint, and the insulating sleeve and the insulating plate are both made of high-temperature-resistant rubber materials.

Preferably, each negative pressure channel is stepped in cross section along the axial direction, and the inner diameter of each negative pressure channel decreases from top to bottom in sequence.

The invention has the beneficial effects that:

1. the arrangement of the conductive nut is convenient for connecting the guide rod and the conductive mechanism, and the guide rod and the conductive nut can be fixed with each other only by rotating the guide rod because the guide rod is in threaded connection with the conductive nut, so that the guide rod is not required to be too much time for installation or replacement.

2. A sealing gasket is arranged at the joint of the guide rod and the inner side wall of the protection joint, and an isolation plate is arranged between the anode plate and the protection joint, so that the part of the conductive mechanism is not contacted with the electrolyte in the oxidation tank, and the short circuit problem of the conductive mechanism is avoided.

3. Through setting up devices such as annular sleeve, connector, annular plate, can select for use suitable annular sleeve's specification according to the size of work piece, unnecessary connector rotatable locking guarantees the pressure value in the negative pressure passageway.

4. Because the temperature of the electrolyte rises faster in the micro-arc oxidation process, the temperature of the electrolyte can be ensured to be always in a proper electrolysis temperature interval by arranging the heat exchange fins, the cooler, the heat exchange head and other devices.

5. The lower surface of the anode plate is located below the lower surface of the annular sleeve in a natural state, when the negative pressure channel generates negative pressure attraction to the workpiece, the workpiece can naturally extrude the anode plate, the anode plate compresses the conductive block and the compression spring, and the workpiece, the anode plate, the conductive block and the conductive nut can be connected more tightly in the mode, so that the circuit is more stable.

6. Through setting up sealing ring and sectorial closing plate, when the negative pressure passageway produced the negative pressure, the closing plate received the negative pressure effect and upwards buckles, made the passageway be in the open mode, after negative pressure passageway pressure disappears, the closing plate resets, makes the passageway closed, avoids electrolyte entering negative pressure passageway under the outage condition suddenly, and the magnetic path can make the closing plate to centre of a circle department extrusion, and under the effect of flexible cover, the sealed effect of centre of a circle department also can obtain guaranteeing.

In conclusion, the invention changes the fixing mode of the workpiece, avoids the damage of the workpiece, and in the fixing process of the workpiece, the workpiece can naturally extrude the conductive mechanism, so that the connection of all parts is tighter, and even if the workpiece generates violent vibration, the connection of the circuit can be kept stable.

Drawings

FIG. 1 is a schematic structural view of kinds of micro-arc oxidation surface treatment devices for bathroom metal workpieces according to the present invention;

FIG. 2 is a schematic structural view of kinds of conducting mechanisms and negative pressure mechanisms used in a device for micro-arc oxidation surface treatment of a bathroom metal workpiece according to the present invention;

FIG. 3 is a schematic structural view of conducting mechanisms used in the natural state of the anode plate of the micro-arc oxidation surface treatment device for the bathroom metal workpiece according to the present invention;

FIG. 4 is a schematic structural view of sealing device parts used in the micro-arc oxidation surface treatment device for the bathroom metal workpiece according to the present invention;

fig. 5 is an enlarged view of a portion a in fig. 1.

In the figure: the device comprises a controller 1, an insulating sleeve 2, a guide rod 3, a protective joint 4, a conductive nut 5, an annular sleeve 6, a conductive block 7, an anode plate 8, a workpiece 9, a negative pressure channel 10, an annular plate 11, an oxidation tank 12, a cover plate 13, a telescopic cylinder 14, a fixing frame 15, a heat exchange plate 16, a workbench 17, a cooler 18, a heat exchange head 19, a connector 20, a compression spring 21, an isolation plate 22, a sealing ring 23, a sealing washer 24, a sealing plate 25, a flexible sleeve 26, a magnetic block 27, noise reduction cotton 28, a positioning column 29 and a groove edge 30.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, of the present invention .

Referring to fig. 1-5, a micro-arc oxidation surface treatment device for a bathroom metal workpiece, comprising a guide rod 3, a protection joint 4, an oxidation tank 12 and a workbench 17, wherein an insulating sleeve 2 is sleeved outside the guide rod 3, a conductive mechanism is arranged in the protection joint 4, the conductive mechanism comprises a conductive nut 5 and an anode plate 8 which are fixedly arranged on the inner side wall of the protection joint 4, a conductive block 7 and a plurality of compression springs 21 are fixedly arranged between the conductive nut 5 and the anode plate 8, the conductive block 7 is made of a flexible conductive material, an isolation plate 22 is arranged between the anode plate 8 and the inner side wall of the protection joint 4, the bottom end of the guide rod 3 penetrates through the top wall of the protection joint 4 and is in threaded connection with the conductive nut 5, the conductive nut 5 is arranged to facilitate the installation of the guide rod 3, the guide rod 3 and the conductive nut 5 can be fixed together only by rotating the guide rod 3, namely, the guide rod 3 and the conductive mechanism are fixed together, a sealing washer 24 is arranged at the connection part of the guide rod 3;

the protective joint 4 is made of insulating materials such as polypropylene or polyvinyl chloride and is subjected to flame retardant treatment, the insulating sleeve 2 and the insulating plate 22 are made of high-temperature-resistant rubber materials, and when the micro-arc oxidation surface treatment is carried out on metal, the protective joint 4, the insulating sleeve 2 and the insulating plate 22 can ensure that the electric leakage phenomenon does not occur and electrolyte is prevented from entering the conductive mechanism;

the outer side wall of the protection joint 4 is provided with a negative pressure mechanism, the negative pressure mechanism comprises an annular sleeve 6 sleeved on the outer side wall of the protection joint 4, a plurality of negative pressure channels 10 are symmetrically arranged in the annular sleeve 6 along the circumferential direction, the bottom end of each negative pressure channel 10 is provided with a sealing device, the top end of each negative pressure channel 10 is connected with an annular plate 11 through corresponding connectors 20, the number and the position distribution of the negative pressure channels 10 can be changed by replacing annular sleeves 6 with different specifications, the connectors 20 are locking valves , pipelines at the positions can be disconnected by rotating the connectors 20, when the number of the negative pressure channels 10 on the annular sleeve 6 is smaller than that of the connectors 20, the redundant connectors 20 can be locked, so that negative pressure can still be generated in the negative pressure channels 10, an air cavity is formed in the annular plate 11 and is connected with a negative pressure generator through a guide pipe, and the negative pressure generator is electrically connected with a controller 1, and the controller 1 is used for generating a.

In the invention, the heat exchange plate 16 is arranged in the side wall of the oxidation tank 12, the cooler 18 is arranged in the workbench 17, the output end of the cooler 18 is fixedly connected with the heat exchange plate 16 through the plurality of heat exchange heads 19, the higher the temperature is, the faster the film forming is, but the roughness is increased, in addition, when the temperature is too high, water vapor is generated, so the temperature of the electrolyte is which is kept in the range of 20-60 ℃, because the temperature of the electrolyte rises faster in the micro-arc oxidation process, therefore, a cooling device is required to be arranged in the metal surface treatment process to control the temperature of the electrolyte in a proper range, the shape of the heat exchange plate 16 conforms to the shape of the tank body of the oxidation tank 12, the heat exchange area can be effectively increased, and the temperature of the electrolyte in the oxidation tank 12 can be better controlled.

The plane of the lower surface of the anode plate 8 is located below the plane of the lower surface of the annular sleeve 6 in a natural state, when the negative pressure channel 10 generates negative pressure attraction on the workpiece 9, the workpiece 9 can naturally extrude the anode plate 8, the anode plate 8 compresses the conductive block 7 and the compression spring 21 until the upper surface of the workpiece 9 abuts against the lower surface of the sealing ring 23, and the workpiece 9, the anode plate 8, the conductive block 7 and the conductive nut 5 can be connected more tightly in the mode, so that the circuit is more stable.

The cross section of each negative pressure channel 10 along the axial direction is stepped, and the inner diameter of each negative pressure channel 10 is sequentially reduced from top to bottom, so that the suction force generated by the tail end of the negative pressure channel 10, namely the end in contact with the workpiece 9, is larger, and the workpiece 9 can be better fixed.

Each sealing device comprises a sealing ring 23, a plurality of sealing plates 25 are symmetrically arranged in the sealing ring 23 along the axial direction, each sealing plate 25 is fan-shaped, the plurality of sealing plates 25 corresponding to each sealing plate in position form sealing circular plates together in a natural state, the diameter of each sealing circular plate is 1mm-2mm smaller than the inner diameter of the corresponding sealing ring 23, and a flexible sleeve 26 is sleeved outside each sealing plate 25, so that the diameter of each sealing circular plate is 1mm-2mm smaller than the inner diameter of the sealing ring 23, because the flexible sleeve 26 outside the sealing plate 25 also has fixed thickness, the thickness of the flexible sleeve 26 is too small, the sealing effect is relatively poor, the relative movement between the sealing plates 25 is not flexible when the thickness of the flexible sleeve 26 is too large, a magnetic block 27 is arranged in each sealing plate 25, each magnetic block 27 is made of samarium cobalt magnet or aluminum nickel cobalt magnet, the micro-arc micro-arc micro-arc micro-magnetic device can work;

under a natural state, the plurality of sealing plates 25 just form sealing circular plates together, the sealing plates 25 have fixed elasticity, when the negative pressure channel 10 generates negative pressure, the sealing plates 25 are bent upwards under the action of the negative pressure to enable the channel to be in an open state, when the pressure of the negative pressure channel 10 disappears, the sealing plates 25 reset to enable the channel to be closed to prevent electrolyte or other impurities from entering the negative pressure channel, the magnetic blocks 27 can enable the sealing plates 25 to be extruded towards the circle center, and under the action of the flexible sleeve 26, the sealing effect at the circle center can be ensured;

a cover plate 13 is arranged on the oxidation tank 12 in a matching mode, the upper end of the guide rod 3 penetrates through the cover plate 13 and extends upwards, a fixed frame 15 is arranged on the workbench 17, two telescopic cylinders 14 are symmetrically arranged at the top end of the fixed frame 15, and the telescopic ends of the two telescopic cylinders 14 are fixedly connected with the upper surface of the cover plate 13;

the cover plate 13 is internally provided with a cavity, silencing cotton 28 is filled in the cavity, partial noise in the micro-arc oxidation process can be isolated, two positioning columns 29 are symmetrically welded on the lower surface of the cover plate 13, a groove edge 30 is welded on the outer side wall of a notch of the oxidation groove 12, two grooves are symmetrically formed in the groove edge 30, the positions of the two grooves correspond to the positions of the two positioning columns 29 respectively, the length of each positioning column 29 is smaller than the depth of the corresponding groove, when the cover plate 13 is clamped with the groove edge 30, the two positioning columns 29 are located in the corresponding grooves respectively, the length of each positioning column 29 is smaller than the depth of the corresponding groove, so that a gap is prevented from being formed between the cover plate 13 and the groove edge 30, and the cover plate 13 can prevent electrolyte from splashing and being ejected.

When the invention is used, a proper amount of electrolyte is added into the oxidation tank 12, the guide rod 3 is installed in the conductive nut 5, then the controller 1, the cooler 18 and the negative pressure machine are started, negative pressure can be generated in the negative pressure channel 10, under the action of the negative pressure, the sealing plate 25 overcomes the magnetic force action between the magnetic blocks 27 and bends upwards, so that the negative pressure channel 10 is in an opened state, and the workpiece 9 is fixed on the lower surface of the annular sleeve 6 by utilizing the action of the negative pressure;

because the plane of the lower surface of the anode plate 8 is naturally positioned below the plane of the lower surface of the annular sleeve 6, when the negative pressure channel 10 generates negative pressure attraction on the workpiece 9, the workpiece 9 can naturally press the anode plate 8, and the anode plate 8 compresses the conductive block 7 and the compression spring 21, so that the workpiece 9, the anode plate 8, the conductive block 7 and the conductive nut 5 are connected more tightly, and the circuit connection is more stable;

after the workpiece 9 is fixed, the telescopic cylinder 14 pushes the cover plate 13 to move downwards, so that the cover plate 13 is buckled with the oxidation tank 12, the noise reduction cotton 28 in the cover plate 13 can absorb noise generated in the micro-arc oxidation process, the guide rod 3 is used as an anode conductive contact point, the top of the guide rod is positioned outside the electrolyte, and the temperature of the electrolyte is controlled within the range of 20-60 ℃ in the micro-arc oxidation process;

after the micro-arc oxidation process is finished, the telescopic cylinder 14 drives the cover plate 13 to move upwards, the controller 1, the cooler 18 and the negative pressure machine are closed, the workpiece 9 is taken down, and at the moment, the sealing plate 25 is reset under the magnetic force of the magnetic block 27, so that the negative pressure channel 10 is closed.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1, are used for bathroom metal work piece micro arc oxidation surface treatment device, including guide arm (3), protection joint (4), oxidation groove (12), apron (13) and workstation (17), characterized by, be equipped with conductive mechanism in protection joint (4), conductive mechanism includes conductive nut (5) and anode plate (8) of fixed mounting on protection joint (4) inside wall, be equipped with conducting block (7) and a plurality of compression spring (21) between conductive nut (5) and anode plate (8) fixedly, be provided with insulating plate (22) between anode plate (8) and protection joint (4) inside wall, the bottom of guide arm (3) runs through the roof of protection joint (4) and with conductive nut (5) threaded connection;

the outer side wall of the protection joint (4) is provided with a negative pressure mechanism, the negative pressure mechanism comprises an annular sleeve (6) sleeved on the outer side wall of the protection joint (4), a plurality of negative pressure channels (10) are symmetrically arranged in the annular sleeve (6) along the circumferential direction, the bottom end of each negative pressure channel (10) is provided with a sealing device, and the top end of each negative pressure channel (10) is connected with an annular plate (11) through a corresponding connector (20); the side wall of the oxidation tank (12) is internally provided with heat exchange fins (16), a cavity is formed in the workbench (17), a cooler (18) is arranged in the cavity, and the output end of the cooler (18) is fixedly connected with the heat exchange fins (16) through a plurality of heat exchange heads (19).

2. The kind of device for processing the micro-arc oxidation surface of the bathroom metal workpiece as claimed in claim 1, wherein the plane of the lower surface of the anode plate (8) is naturally located below the plane of the lower surface of the ring-shaped sleeve (6).

3. be used for bathroom metal work piece micro arc oxidation surface treatment device of claim 1, characterized in that, every sealing device all includes sealing ring (23), every be equipped with a plurality of sealing plates (25) along the axis direction equal symmetry in sealing ring (23), every sealing plate (25) are fan-shaped, and the corresponding a plurality of sealing plates (25) in position constitute sealed plectanes jointly under natural state, every the diameter of sealed plectane all is 1mm-2mm less than the internal diameter that corresponds sealing ring (23), every sealing plate (25) outside all is equipped with flexible cover (26), every all install magnetic block (27) in sealing plate (25), every the magnetic block samarium cobalt magnet or alnico magnet make by.

4. The kind of device for surface treatment by micro-arc oxidation of bathroom metal workpiece according to claim 1, wherein a cavity is formed in the cover plate (13), the cavity is filled with sound-absorbing cotton (28), two positioning posts (29) are symmetrically welded on the lower surface of the cover plate (13), a groove edge (30) is welded on the outer side wall of the notch of the oxidation groove (12), two grooves are symmetrically formed on the groove edge (30), the positions of the two grooves correspond to the positions of the two positioning posts (29), respectively, and the length of each positioning post (29) is smaller than the depth of the corresponding groove.

5. The kind of device for surface treatment of bathroom metal workpiece by micro-arc oxidation according to claim 1, wherein the annular plate (11) has an air cavity formed therein, the upper end surface of the air cavity is connected with a negative pressure generator through a conduit, and the negative pressure generator is electrically connected with a controller (1).

6. The kind of device for surface treatment by micro-arc oxidation of bathroom metal workpiece according to claim 1, wherein the protection joint (4) is made of flame retardant treated insulation material such as polypropylene or polyvinyl chloride, the outer sleeve of the guide rod (3) is provided with an insulation sleeve (2), an insulation plate (22) is arranged between the anode plate (8) and the inner side wall of the protection joint (4), and the insulation sleeve (2) and the insulation plate (22) are made of high temperature resistant rubber material.

7. The kind of surface treatment device for sanitary and bath metal workpiece micro-arc oxidation according to claim 1, wherein each negative pressure channel (10) has a stepped cross-sectional shape along the axial direction, and the inner diameter of each negative pressure channel (10) decreases from top to bottom.